Chuck



C. F. SWISSGABEL.

CHUCK. APPLICATION FILED FEB. I8, 192D- 1,401,207, Patented Dec. 27, 1921.

` 2 SHEETS-SHEET 2.

A TT RNEYS.

UNITED STATES PATENT oFFlcE,

CHARLES F. SWISSGAQBEL, OFKDAYTON, OHI.

CHUCK.-

Specification of Letters Patent. Paignted Dec. 27, 1921.

Application led February 18, 1920. Serial No. 359,738.

Y 'and grooves so that adjustment of the jaws may be maintained normalindeinitely.

It is well known inthe trades in which chucks of theA usual types are used that the chuck jaws andthe grooves or vtiays in which the jaws operate become worn in time yto such Aextent that the jaws lose their alinement relative to eachv other and the chuck body, therefore their eli'ectiveness in holdin and lalining the work supported thereby wi l befdestroyed', or impaired to such extent that the chucks will be rendered useless for accurate work.

yIn chucks of ordinary construction no provision is made to compensate for wear ot i i" the jaws andv ways. Therefore when these parts` become worn to any considerable eX- tent it is necessary to discard the chucks where accurate work is required. This involves considerable expense as the cost of the chucks is relatively high. Thus with the provision made in the present invention toV adjust the jaws to compensate for wear the working life 'of the chucks is prolonged indefinitely, material economies being there-n by effected in Vreplacement costs.

A further advantage derived Vfrom the present invention consists in thelower cost at which the improved chucks can be produced, the chucks of any given size being lighter and relatively stronger, and requiring less; and cheaper machining operations in their manufacture. Furthermore the chuck jaws and grooves are less subject to j breakage than chucks of ordinary construcy my invention;

Fig. 2 is a detail end view of the chuck i jaw and the adjusting mechanism;

Fig. 3 is a detail of the chuck groove with the jaw removed therefrom;

Fig. 4L is a detail of the chuck jaw and Fig. 5 is a detail 01"' the tapered key or wedge for adjusting the jaws.

The invention may be applied to any suitable form of chuck body. .As here shown a chuck body l ot the usuallconstruction is employed having any suitable number of channels or grooves 2 formed therein to rew ceive the jaws 3; the lower portion of the channel being rectangular `shaped in cross dimension the bottom being 'inclined up` wardly toward the center of the chuck and the upper opposite walls`5 of the channel" being inclined toward each other, the bottom of the channel being substantially wider than the top.

That part of the chuck jaw cooperating with the channel is shaped in cross-section to iit the upper portion of the groove, thus the jaw consists of a lower portion 6 having outwardly inclined working surfaces 7 adapted to engage the inclined walls 5 of the groove 2, the upper portion of the jaw extending above the face of the "chuck and being provided in the usual manner with stepped j gripping aws 8.

As above stated the bottom of the groove.

2 is inclined upwardly toward the center' of the chuck. An adjusting wedge 9, tapered on the bottom side thereof from its outer to its inner end to conform "to the angle of the inclined bottom 4, is tted into the lower portion of the grooveQ; thus the upper Ytace of the-wedge will be substantially parallel with the bottom of the jaw and in working contact therewith.` A

The wedge 9 is adjustable' longitudinally in the groove Z by means of adjusting screws l0 which are secured in the body of the chuck adjacent the outer end of the wedge 9, having their heads sunk below the periph eral surface of the chuck and in engagement with slots 1l formed in the opposite edges of the wedge. Thus byy adjusting the screws the wedge will be moved longitudinally toward or away from the center of the'chuck, and the chuckaw will be raised or lowered accordingly relative to the face of the chuck ;v

when the screws are adjusted inwardl the wedge will, be moved inwardly towar the center of the chuck and the jaw will be raised; and when the screws Vare adjusted outwardly the wedge will be moved outwardly and the jaw will be lowered, Ythe extent of adjustment in Veither directionbeing Vdetermined by the amount of movement imparted to the wedge. f

Thus it will be seen that wear of the chuck vjaws andv grooves can readily be compensated for byv adjusting the screws .to move the wedge inwardly, and the jaws may be eased inthe grooves or removed therefrom by adjusting the screws to move the wedge outwardly.

The jaws 8 are adjusted longitudinally in the grooves 2 by threaded boltsor screws 12,

. the bottom ofthe jaw 3 khaving a semi-circular, threaded depression 13 formed therein to cooperate with the screw l2 to edect the adjustment, and the4 upper face of the wedge as here Lshown having a semi-circular clearance depression 14 formed therein to receive the lower portion of the screw. Longitudi-` nal'movement of the screw is prevented by means of a threaded lock or retaining stud l5 secured inthe body of the chuck and cooperating with an annular groove lr6 formed inthe screwl2 near its inner end. Thus, by rotating the screw thechuck jaws may be kadjusted in either direction as desired.` To

binations of construction of the appended claims.

t Letters.V Patent, is r- Having thusk fully describedmy invention, what I claim as new and l. The combinationwith a chuck body, of a `groove in said body having upwardly and inwardly inclined walls and they bottom thereof inclined upwardly toward the centerV of the chuck, a jaw operable'in said grooveV and having opposite inclined surfaces coperating with the Vinclined surfaces of the groove, and an adjusting member interposed between the bottom of the groove and said jaw ,and tapered to vconform with the inclination of the bottom of the groove, and means to adjust said member longitudinally to raise or lower the jaw relative' to the bottom of the groove.

2. The combination with a chuck body, of

a Agroove in said body having its bottomv thereof incl-ined upwardly toward the center of ,thechuck, .a jaw Voperable in said groove,

means .to retain the jaw in workingl relation.,

leffect adjustment of said desire to secure by.

with the groove, an adjusting member interposed between' the bottom ofthe groove and saidjaw and tapered to conform with the inclination of the bottom of the groove, means to adjustthejawfradially of the chuck Y body and means to adjust said member longitudinally to raise or lower the jaw relative tothe bottom of the groove. Y

. 3. rPhe combination with a chuck body, of an undercut groove in said body, a jaw operable in said-groove, an adjusting member interposed between the bottom of the groove" and the jaw whereby the jaw may be raised or lowered relative to the bottom of the groove, and means for adjusting said jaw longitudinally in-said groove. Y

et. The combination with a chuck body, of an undercut groove in said body, ajaw-operable in said groove, a member interposed between the bottom of the groove and the jaw and adjustable longitudinally in said groove whereby the jaw may be raised or v. lowered relative to the bottom of the groove and means independent of said -member to jaw longitudinally in said groove. j x

5. The combination with a chuck body, of

an undercut groove-in said body, a jaw opr erable in said groove and a vmember inten' posed betweenthe bottom-of the groove and the jaw and adjustable longitudinally in said groove whereby the jaw may 'beraised -i or lowered relativeV to the bottom. of the groove and means interposed between thejaw and said member to move the jaw longitudinally in said groove.

6. The combination with a chuck body,.of an undercut groove in said body having the bottomV thereof inclined upwardly' Atoward the center of the chuck, a jaw mounted for adjustment longitudinally in saidgroove, a l

wedge tapered to conform to the inclination of the bottom of the groove and interposed between the bottom `Vandrsaid jaw to effect wear compensating adjustment of the latter,

and an adjusting screw secured in said body Y whereby said wedge may be moved longitudinally in saidv groove to. raise or .lower the jaw relative to the bottomV of the groove.

'7. The combination with a chuck body, of an undercut groove iii-said body .having the bottom thereof inclined upwardly towardV .the center of the chuck, a jaw operable in4 said groove, a wedgey tapered to conform Ato the inclination ofthe bottom of the groove. and interposed between the bottom andsaid jaw and an adjusting'screw secured in said body whereby said wedge may be moved longitudinally in said groove to yraise or Y lower the jaw relative to the bottom of the groove, and an adjusting screwinterposed between the wedge and the` jaw to moveflthe jaw longitudinally in the groove.

8. The `combination with a chuck body, of.

an undercut groove in said body.a jaw mounted for adjustment in one direction in the groove, and an adjusting member interposed between the chuck body and said jaw to compensate for loose movement of the jaw in another direction. y

9. The combination with a chuck body, of an undercut groove, a jaw having a threaded depression, a jaw adjustingmember interposed between the bottom of the groove and the jaw and having a clearance depression and arranged to compensate for lateral displacement of the jaw, and a jaw adjusting member operable in said depressions.

10. The combination with a chuck body, a groove in said body having undercut working surfaces, a jaw operable in said groove and having angularly working surfaces cooperating with the working surfaces of the groove, and an angular adjustin member interposed between the bottom of t e groove and said jaw to compensate for wear between said surfaces.

l1. In combination, a chuck body member, a jaw member, an undercut groove in one of said members, a projecting portion provided on the other member and sldably engaging the groove, a member interposed between the bottom of said groove and said projecting portion and adjustable longitudi nally in said groove whereby the jaw may be raised or lowered relatively to the bottom of the groove, and means for adjusting said projecting portion longitudinally in Said groove.

In testimony whereof, I Vaffix my signature.

CHARLES F. SVVISSGABEL. 

